Archive | Weed-of-the-Month

Orange hawkweed in bloom

May’s Weed of the Month: Orange Hawkweed

Orange hawkweed (Hieracium aurantiacum) is a relatively new invasive weed in Clackamas County.  With your help, our team plans to keep it from becoming a common problem for landowners! A member of the sunflower family, orange hawkweed is native to central and southern Europe and grows in open areas like gravel pits, roadsides, meadows, pastures, […]

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garlicmustardslider

April’s Weed of the Month: Garlic Mustard

Garlic mustard (Alliaria petiolata) is an increasingly invasive weed in our community.  Native to central and western Europe, this fast-growing plant commonly invades sites such as parks, trails, roadsides, and streamsides. April is a great time to manage this priority invasive weed on your property. Sometimes referred to as Jack-by-the-hedge, garlic mustard is easily identified […]

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ivy-slider2

January’s Weed of the Month!

Our first 2017 weed of the month is ivy! You’ve probably seen it carpeting the ground in a natural area, or perhaps completely covering a wall, or possibly climbing high up a tree. Like many invasive plants, it was introduced as an attractive ornamental plant for landscaping. However, it escaped! Ivy has become highly invasive […]

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Holly slider

December’s Weed of the Month!

Deck the Halls with Boughs of Holly! December is the month when our busy lives get busier. The December mad dash of shopping, baking, wrapping, and mailing, ultimately gives way to the holidays spent surrounded by our loved ones. December should be a time of enjoying each others company, not concerning ourselves with weeds. After […]

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Italian arum slider

October’s Weed of the Month!

Its October, and that means its time for a new Weed of the Month! We are working with our partners at the Columbia Gorge Cooperative Weed Management Area to promote invasive Italian arum  (Arum italicum) as our weed-of-the-month for October. Italian Arum, also known as “orange candleflower” and “Italian lords and ladies,” is a non-native […]

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Knotweed

September’s Weed of the Month!

Its September, and that means its time for a new Weed of the Month! We are working with our partners at the Columbia Gorge Cooperative Weed Management Area to promote invasive knotweeds  (Fallopia sp.) as our weed-of-the-month for September. Knotweed is a horribly invasive plant unleashed on the countryside by well-intentioned gardeners attracted to its […]

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puncturevine-slider

August’s Weed of the Month!

Its August, and that means its time for a new Weed of the Month! We are working with our partners at the Columbia Gorge Cooperative Weed Management Area to promote Puncturevine  (Tribulus terrestris) as our weed-of-the-month for August. Puncturevine is a sprawling annual plant that forms a dense mat with very sharp, spiny seed heads. […]

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knapweedslider

July’s Weed of the Month!

We are once again partnering with our friends from the Columbia Gorge Cooperative Weed Management Area to feature invasive knapweeds as the target weed for the month of July. Clackamas County has many kinds of knapweed, but the three most commonly found in our area are Spotted, Diffuse and Meadow.  Although slightly different, they all […]

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Scotch broom flowers

June’s Weed of the Month!

Its June, and that means its time for a new Weed of the Month! We are working with our partners at the Columbia Gorge Cooperative Weed Management Area to promote Scotch Broom (Cytisus scoparius) as our weed-of-the-month for June. Scotch broom was introduced as an ornamental along highway corridors and in western Oregon as a […]

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